Best used as a MSR Fuel Pump Control Valve Knob for liquid fuel pumps. Take a careful look at the photo and try to match this to your original part. Send back if not a fit.

This is assumed to be a Control Valve for blue pumps, with a red ring, that came with MSR Stoves. This part is not expected to be compatible with all MSR pumps.

This Control Valve is marked with + and - (for OFF and ON) with an arrow. It comes with an O-Ring, spring and tip.